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(No Model.)

' A. MQBEAN 8: J. H. WATSON.

EVAPORATING SALT BRINE. No. 252.612. Patented Jan. 24,1882.

WITNESSES: INVENTOR 3,

ATTORNEY.

STATES PATENT Trice.

ALEXANDER MOBEAN AND JAMES H. WATSON, OF TAWAS CITY, MICHIGAN, ASSIGNORS F ONE-THIRD TO. HENRY CLARK, OF SAME PLACE.

EVAPORATING SALT-BRINE.

SPECIFICATION forming part of Letters Patent No. 252,612, dated January 24, 1882.

Application filed July 28,1851. (No modem To all whom 225 may concern:

Be it known that we, ALEXANDER MCBEAN and JAMES H. WATSON, both citizens of the United States, residing at Tawas City, county of Iosco, and State of Michigan, have made certain Improvements in Evapora'tiug Salt Brine, of which the following is a specitica tion.

Our invention relates to making salt by the To use of hot water in pipes by'a constant circulation of hot water (through the pipes) from boiler to grainer or block and from grainer to boiler under any required pressure. In this arrangement, instead of letting the heated water run away after running through the pipes in the grainer, and thereby losing a large amount of heat, we save all this by circulating the hot water directly back to the boiler or boilers, by which it or they are supplied with water at from 200 to 220 heat, instead of having to pump in cold water, as is now done, to be heated. We thus save a great amount of fuel, and by keeping up a continuous circulation under pressure we get a much greater amount of heatin the pipes and make from one-quarter to one-half more salt, also saving in labor from one-quarter to one-half, and also saving in grease or butter used to make thesalt fine, all of which we obtain by the extra 0 amount of heat in the pipes,and consequently in the grainer or block which holds the brine.

The object of our invention is to greatly reducev the cost in fuel, labor, &c., and by our constant circulation of hot water to save at 5 least one-half, which we do; and the invention consists in getting a constan-tcirculation of hot water through the pipes in the grainer or grainers andto and from the boiler, and keep this up as long as required with proper press- 0 ure.

It is customary to run the boilers during the day for saw-mills and using the exhaust steam for salt-making, it going into the pipes and then running off. We shut off the steam 5 at night from the boiler and take anywhere from below the water-line hot water, sending the same through the series of pipes inside the salt-tanks or grainers, the pipes therein being arranged to give complete circulation through them, and return the water via a mudpipe to the boiler by any suitable boiler-feeder, and keep this up automatically as long as required.

In the drawings, Figure 1 represents a side elevation of the brine-tank or grainer, pipes, and boiler; Fig. 2, a plan of the same.

A is the boiler; B, the mud-pipe; O, the hot- Water supply to grainer G; D, the return-pipefrom grain'er to boiler; E, an injector or boiler-feeder;- I steam-pipe to injector.

H H H are the circulating-pipes in the grainer G, fed from the boiler A by the pipe 0, and by return-pipe l) and mud-pipe B back to the boiler at any suitable point, where it is sufficiently reheated and again returned through the same pipes, as described, thus keeping up a constant circulation of hot water, and with only fire enough to keep steam at the required pressure, which of course is but slight.

\Ve do not wish to be confined to any exact arrangement of the pipes, as we believe ourselves to be the first to make salt by a constant circulation of hot water substantially as described.

Any number of grainers and boilers may be used according to the requirements of the work or the salt block. The grainers are usually boxes one hundred and eighty feet by twelve feet, filled with brine.,

In the use of steam for a circulating medium the process is necessarily slow, for before anything can be returned to the boiler itisnecessary for the steam to be condensed, while in the use of water a constant rapid flow from the boiler to the block and return and constant and rapidgiving off of heat, and at the same time the Water is returned to the boiler in a heated state.

We claim- The method of manufacturing salt, the same consisting of maintaining a constant and rapid circulation of hot water from the boiler to the blocks and return, as contrailistinguished from a similar circulation of steam, as set forth.

In witness whereof we have hereunto signed our names in the presence of two subscribing w'itnesses.

ALEXANDER MOBEAN. JAMES H. WATSON.

Witnesses JOHN B. McRoBERTs, GEO. McBEAN. 

